At the gateways of walled cities special care was taken to increase the strength of the wall and the power of resistance, since the most formidable attacks of the enemy would probably be made there. The ordinary thickness of wall not being sufficient it was here widened, or, more properly, doubled. Considerable space was included between the outer and the inner wall, and to each of these walls there was a gate. It was in the room thus made that “David sat between the two gates.”